Chris Rovillos, Alisha Saxena, +Tadayoshi Kohno
and I have just released TrackingObserver, a browser-based web tracking detection platform. TrackingObserver is a Chrome extension that acts as a platform for detecting, measuring, and blocking third-party web trackers. Unlike other tools, TrackingObserver does not use a blacklist of known tracking domains, but rather detects and categorizes trackers automatically based on their in-browser behaviors (such as setting and receiving third-party cookies).
TrackingObserver also provides an API for third-party add-ons (themselves Chrome extensions), and we've provided a few demo add-ons on the webpage.
TrackingObserver and more information are available here: http://trackingobserver.cs.washington.edu/
We hope that TrackingObserver will be valuable for users, developers, and web tracking researchers, and we welcome your suggestions and feedback to help us improve our tool!